<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>管理员页面</title>
  <style>
    body {
      font-family: Arial, sans-serif;
      background-color: #f4f4f4;
      margin: 0;
      padding: 20px;
    }
    h1 {
      text-align: center;
      color: #333;
    }
    button {
      display: block;
      width: 200px;
      padding: 10px;
      margin: 10px auto;
      background-color: #007BFF;
      color: #fff;
      border: none;
      border-radius: 3px;
      cursor: pointer;
    }
    button:hover {
      background-color: #0056b3;
    }
  </style>
</head>
<body>
<h1>管理员页面</h1>
<button onclick="window.location.href='add-book.jsp'">添加图书</button>
<button onclick="window.location.href='query-book.jsp'">查询图书</button>
<button onclick="window.location.href='update-book.jsp'">修改图书</button>
<button onclick="window.location.href='delete-book.jsp'">删除图书</button>
<button onclick="window.location.href='all-books.jsp'">显示全部书籍</button>
</body>
</html>